This record as markdown: /tools/eyalm321-zernio-mcp/zernio-update-profile.md
What zernio_update_profile does on Zernio
AI agents use zernio_update_profile to create or update resources in Zernio, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zernio environment.
Why zernio_update_profile is rated Medium
This tool modifies user profile information, which is a write operation that creates or updates data reversibly. While not destructive, it affects account settings and identity information. Severity is high because an AI agent could maliciously modify account credentials, contact information, or other sensitive profile fields, potentially locking out legitimate users or impersonating them.
From the tool's definition Tool name includes 'update', and description states 'Update the current user', indicating modification of user profile data.
Attacks that exploit this kind of access
The rule that runs zernio_update_profile safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Zernio, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For zernio_update_profile, this is the rule to start with:
zernio_update_profile stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Zernio, apply this rule, and every zernio_update_profile call is checked against it from then on.
Questions about zernio_update_profile
Update the current user. It is categorised as a Write tool in the Zernio MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Zernio MCP server in PolicyLayer and add a rule for zernio_update_profile: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Zernio. Nothing to install.
zernio_update_profile is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the zernio_update_profile rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for zernio_update_profile. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
zernio_update_profile is provided by the Zernio MCP server (eyalm321/zernio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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